Lens-screen.



E. G. JOHANSON.

LENS SCREEN.

APPLICATION FILED JULY 25. 1912.

A TTORNEYS.

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EMIL G. JOHANSON, OF CHICAGO, ILLINOIS.

LENS-SCREEN.

Specification of Letters Patent.

Patented Feb. 5, 191%.

To all whom it may concern:

Be it known that I, EMIL Gr. JOHANSON, a subject of the King of Sweden,residing at Chicago, in the county of Cook and Stateof Illinois, haveinvented new and useful Improvements in Lens-Screens, of which thefollowing is a specification.

This invention relates to automobile headlights and the like, and itsobject is to provide a simple and inexpensive device which will diffusethe light rays and eliminate glare.

In order that the invention may be better understood, reference is hadto the accompanying drawing forming a part of this specification, inwhich Figure 1 is an elevation of the device;

Fig.2 is a section on the line 2-2 of Fig. 1; and

Fig. 3 is an elevation of a modification.

Referring specifically to the drawing, the device which is the subjectmatter of the present invention comprises a thin, circular disk 5 ofmetal or other stiff and opaque material. The disk is perforated, pershowing in Figs. 1 and 2, with a central aperture 6, and with a seriesof circular perforations 7, the latter being arranged in concentriccircles, the perforations of one circle being situated in alternationwith those of the next inner and outer circles. of the concentricarrangement of the circles, the perforations 7 increase in diameterradially outward from the center of the disk. In alternation with theoutermost circle of perforations 7 is a series of apertures 8, any ofwhich may be associated with the central aperture 6 for the applicationof a punching tool designed to punch out one radial row of perforations7 as a unit at one time. Of course, the apertures 6 and 8 have nofunction, or are not necessary, when. all the On account perforations 7are punched out at one time by a machine of corresponding capacity.

In use, the perforated disk is placed against the inner face of theheadlight glass or lens; The light emitted by the lamp will be broken upor scattered in passing through the perforations in the disk, theblinding o1.- glaring effect thus being eliminated. The amount of lightemitted will not be lessened appreciably, but its quality will be softeron account of the diffusing eifect of the perforated disk, and thelantern-like optical effect produced on a dark night will make theheadlights of the vehicle a novel attraction. The disk, on account ofits simplicity, should be very inexpensive to manufacture, and for thesame reason should be easy to install and cheap to renew.

Fig. 3 shows a modification of the abovedescribed disk, being cut withdiamondshaped perforations 9, arranged similarly to the circularperforations 7 in the structure of Figs. 1 and 2. As a matter of designthe perforations nearest the center are elongated to permit narrow beamsof light to penetrate the central portion of the disk.

I claim 1. A lens screen comprising a disk of stiff material, provided-with perforations arranged in concentric circles, the perforationsincreasing in size radially outward from the center of the disk, and theperforations of one circle being staggered with respect to those of thenext inner or outer circle.

2. A lens screen comprising a disk of stifi material provided withperforations which are relatively small at the center of the disk, andgradually increase in size radially outward from the center.

In testimony whereof I afix my signature.

EMIL G. J OHANSON.

topics or this patent may he obtained for five cents each, by addressingthe Commissioner or Yatents,

Washington, D. G.

